SKU: B325650 | UPC: 731946517580
COBB NexGen Flex Fuel Ethanol Sensor Kit – 2008-2021 Subaru STI (incl. 2018 Type RA)
The COBB 325650 NexGen Flex Fuel Kit delivers precise ethanol content analysis and fuel temperature monitoring straight to your Accessport for 2008–2021 Subaru WRX STI models. This plug-and-play system supports real-time tuning with E85, E60, or pump-gas blends on EJ257 engines, including automatic cold-start adjustments and complete safety features. Install inline on feed or return line with zero wiring modifications for reliable performance on track or street.
Key Features
- True Ethanol % + Fuel Temp: Live data display on Accessport enables accurate fuel mapping and adjustments.
- 100% Plug-and-Play: Connects directly to Accessport V3 harness without cutting or splicing factory wires.
- Continental Ethanol Sensor: Factory-grade sensor measures 0-100% ethanol with -40°F to +257°F temp range for long-term reliability.
- Full Flex Fuel Tuning Support: Integrates with OTS maps for auto-blending, cold-start compensation, and limp-mode safety.
- Made in the USA: Built with lifetime warranty against defects, proven on 600-1000+ hp EJ257 builds.
Product Notes
- Fits all 2008–2021 WRX STI including 2018 Type RA and 2021 Final Edition.
- Requires Accessport V3; COBB Fuel Rails + FPR kit recommended for optimal flow.
- In stock and ships same or next business day in official COBB retail box.
Installation Notes
- Professional installation recommended.
- 60–90 minute install using -6 AN male inlet/outlet fittings and adapters on feed or return line.
- Accessport auto-detects sensor post-install; no ECU flashing needed.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2021 | Subaru | WRX STI | Incl. 2018 Type RA, 2021 Final Edition |
Why Choose COBB Tuning?
- #1 name in Subaru performance for over 20 years.
- Engineered and manufactured in the United States.
- Proven on every 600–1000+ hp EJ257 Flex Fuel build worldwide.
Frequently Asked Questions
- Q: Does it work on my 2018 Type RA?
A: Yes – fits every 2008–2021 STI model including Type RA and Final Edition. - Q: Do I need COBB fuel rails?
A: Recommended but not required – installs on factory feed or return line with -6 AN adapters. - Q: What about warranty or durability?
A: Lifetime warranty against defects; Continental sensor rated for automotive extremes.
Shipping & Handling
- Method: UPS/FedEx Ground – fully insured
- Availability: In stock – ships same or next business day
- Packaging: Official COBB retail box (10 x 8 x 4 inches)
- Weight: 1.5 lbs shipping weight
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